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/*Copyright (c) 2014, Florent DEVILLE.                                      */
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#ifndef CAMERA_STATE_FOLLOW_TARGET_H
#define CAMERA_STATE_FOLLOW_TARGET_H

#include "IState.h"
using namespace Devil::FSM;

#include "snVec.h"

using Supernova::snVec;
#include "snGlobals.h"

#include "VecLinearDamper.h"

namespace Devil
{
	class IWorldEntity;
	class EntityCamera;

	SN_ALIGN class CameraState_FollowTarget : public IState
	{
	private:
		EntityCamera* m_camera;

		//The target to follow
		IWorldEntity* m_target;

		//Distance from the target to the camera.
		float m_distance;

		//Height of the camera above the target.
		float m_height;

		//The forward vector of the camera.
		snVec m_forward;

		//Damper used to smooth the camera position
		VecLinearDamper m_positionDamper;

		//Damper used to smooth the camera look at.
		VecLinearDamper m_lookAtDamper;

	public:
		CameraState_FollowTarget(EntityCamera* _camera, IWorldEntity* _target, float _distance, float _height);
		~CameraState_FollowTarget();

		void enter();

		void execute();

		void exit();

		void* operator new(size_t _count);

		void operator delete(void* _p);
	};
}
#endif
//ifndef CAMERA_STATE_FOLLOW_TARGET_H